Question

what are groups what is period in periodic table how many groups and how many periods are present ​

Answer 1

Step-by-step explanation:

the vertical columns are known as groups and horizontal rows are known as periods. There are eighteen groups in modern periodic table designated as 1- 18 and there are seven periods in the modern periodic table

Answer 2

The horizontal rows in modern periodic table are called periods.

The vertical columns in modern periidic table are called groups.

There are 18 (1to18) peroids and 7 groups.